1. a(n) _ is a substance that helps in the chemical digestion of food.
A. epiglottis .
B. enzyme.
C. gallbladder.
D. peristalsis.
2. the _ is a small flap of tissue that closer the windpipe when you swallow food to keep you from chocking.
A. epiglottis.
B. enzyme.
C. gallbladder.
D. peristalsis.
3. which of the following organs is where most nutrients are absorbed?
A. large intestine.
B. esophagus.
C. small intestine.
D. stomach.
4. the kidneys contain millions of tiny filtering units called
A. urine.
B. villi.
C. peristalsis.
D. nephrons.
5. the kidneys have the important job of
A. reabsorbing water into the bloodstream.
B. filtering the blood to remove wastes.
C. breaking down food mechanically.
D. producing bile to help digest fats.
6. proteins are made up of substances called
A. amino acids.
B. sugars.
C. carbohydrates.
D. starches.
1. B. enzyme.
2. A. epiglottis.
3. C. small intestine.
4. D. nephrons.
5. B. filtering the blood to remove wastes.
6. A. amino acids.
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1. The correct answer is B. enzyme.
To find the answer, you need to know what a substance is that helps in the chemical digestion of food. The process of chemical digestion involves breaking down food into smaller molecules using enzymes. Therefore, the correct answer is an enzyme.
2. The correct answer is A. epiglottis.
To find the answer, you need to know what small flap of tissue closes the windpipe when you swallow food to prevent choking. The epiglottis is a flap of tissue located at the base of the tongue that covers the opening to the windpipe (trachea) when you swallow food, diverting it to the esophagus instead. Therefore, the correct answer is epiglottis.
3. The correct answer is C. small intestine.
To find the answer, you need to know which organ is responsible for absorbing most nutrients. The small intestine is the primary site of nutrient absorption in the digestive system. It has a large surface area due to the presence of finger-like projections called villi, which increase the area available for absorption. Therefore, the correct answer is the small intestine.
4. The correct answer is D. nephrons.
To find the answer, you need to know the name of the tiny filtering units in the kidneys. The kidney's functional units are called nephrons. They are responsible for filtering waste products and excess water from the blood to produce urine. Therefore, the correct answer is nephrons.
5. The correct answer is B. filtering the blood to remove wastes.
To find the answer, you need to know the important job of the kidneys. The kidneys are responsible for filtering the blood to remove waste products, excess water, and toxins. This filtered waste material then forms urine, which is excreted from the body. Therefore, the correct answer is filtering the blood to remove wastes.
6. The correct answer is A. amino acids.
To find the answer, you need to know what substances proteins are made up of. Proteins are composed of smaller units called amino acids. Amino acids are organic compounds that contain an amino group (-NH2) and a carboxyl group (-COOH) bonded to a central carbon atom. Therefore, the correct answer is amino acids.